Related Experiment Videos
Acoustic reflectometry: spectral analysis and the conductive hearing loss of otitis media
1Department of Pediatrics, Yale University School of Medicine, New Haven, CT, USA.
Insights
Acoustic reflectometry can predict hearing loss from otitis media. Measuring the reflected sound spectrum shows promise for objectively assessing conductive hearing loss in middle ear infections.
Area of Science:
- Otolaryngology
- Audiology
- Pediatric Primary Care
Background:
- Otitis media is a common cause of conductive hearing loss in children.
- Accurate and objective assessment of hearing loss associated with otitis media is crucial for timely intervention.
Purpose of the Study:
- To evaluate if acoustic reflectometry, specifically the quality of sound reflected from the tympanic membrane, can predict hearing loss due to otitis media.
- To explore the potential of acoustic reflectometry as a diagnostic tool for middle ear disease.
Main Methods:
- A pediatrician examined 257 patients using clinical criteria, tympanometry, and an acoustic reflectometer.
- Ears were diagnosed as normal, acute otitis media, or otitis media with effusion.
- Hearing testing was performed by a blinded audiologist.
Main Results:
- A spectrum width of less than 95 degrees accurately identified ears with hearing loss of 30 dB or more due to otitis media.
- In a subset of 99 ears with otitis media, 96 showed improved hearing and clinical status with a broader reflected sound spectrum upon follow-up.
Conclusions:
- Measuring the width of the reflected sound spectrum using acoustic reflectometry shows promise as a new technology.
- This method may provide objective information regarding the likelihood of conductive hearing loss caused by otitis media.
Objective:
To test the hypothesis that the quality of sound reflected from the tympanic membrane with acoustic reflectometry is predictive of hearing loss caused by otitis media.
Methods:
A pediatrician in solo primary care practice examined 257 patients for middle ear disease using clinical criteria, tympanometry and an acoustic reflectometer with a recording device. Each ear was diagnosed as normal, acute otitis media or otitis media with effusion. Hearing testing with a select picture audiometer was performed by a technician who was blinded to the diagnosis. Paired data were obtained on some ears.
Results:
A spectrum of < 95 degrees identified 100% of the ears hearing at 30 dB or more because of otitis media. Paired data were obtained on 99 ears with otitis media that failed audiometry on the initial visit. On return 96 of the 99 showed a broader spectrum of reflected sound with improved hearing and clinical improvement of otitis media.
Conclusions:
Measurement of the width of the spectrum of reflected sound is the basis for a new technology that shows initial promise for being able to provide objective information about the probability of conductive hearing loss caused by otitis media.